header,footer,nav,video,audio,article,section,aside,hgroup,time,address,output,figure,figcaption,dilog,canvas{
	display: block;
}
mark{
	display: inline;
}
*{
	margin:0;
	padding:0;
}
ul li{
	list-style: none;
}
header{
	width:100%;
	height:60px;
	background:greenyellow;
	font-size:20px;
	color:#fff;
	line-height: 60px;
}
header .logo,header nav{
	float:left;
}
header nav li{
	float:left;
	font-size:14px;
	color:#fff;
}